Heat distribution.



W. J. GILBERT.

HEAT DISTRIBUTION.

APPLICATION FILED MAY 10. 1915.

1,184,677. Patented May 23,1916.

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WILLIAM J. GILBERT, OF CHICAGO, ILLINOIS.

HEAT DISTRIBUTION.

' Specification of Letters Patent.

Patented May 23, 1216.,

- Application filed May 10, 1915. Serial No. 27,216.

To all whom it may concern Be it known that I, WILLIAM J. GILBERT, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Heat Distribution, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to heat distribution or heating systems and isinore particularly of value in connection with heating plants in connection with which my invention makes it possible to reclaim a portion of the heat which otherwise is lost through the smoke pipe and stack.

My invention contemplates the provision of a heating chamber arranged around the stack and the smoke or exhaust pipe leading from a fire, thus forming what is in effect a double walled chimney or stack. The inner chamber conducts the products of combustion and the outer chamber is sup plied with fresh air which travels upwardly around the inner chamber and is then led into the rooms through registers which are provided in the outside wall of the chamber.

I will explain my invention more in detail by referring to the accompanying drawing illustrating one embodiment thereof in which Figure 1 is a side view partly in section of a system constructed in accordance with my invention; Fig. 2 is asectional View on line aa of Fig. 1, and Fig. 3 is a sectional view on line Z) of Fig. 1.

In accordance with my invention, I utilize a boiler 1 or other suitable means of producing heat, and which has a fire, the products of combustion from which are led out through the smoke pipe 2. This pipe 2 leads into a flue 3 which consists preferably of hollow tile sections overlapping in a suitable manner, as shown at 4;, so that gases which are the products of combustion will not have a tendency to escape from the interior of said flue to the surrounding space. This flue 3 extends upwardly into the open air outside of the house as clearly shown. A brick chimney 5 is built as customary from the foundation level to the roof and is provided with what might be called an offset or platform 6 slightly above its base. This offset portion is adapted to receive and support the flue 3 consisting of the tile sect1ons. At suitable intervals brick sections 7 are extended inwardly to form a guide for the flue, these brick sections being preferably adapted not to bind the tile, but merely serving as guides so that the flue 3 may expand and contract in accordance with its temperature. At the top of the chimney 5 a suitable closure 8 is provided to seal the space substantially between the flue 3 and the chimney, thus forming within the chimney and about the flue a heating chamber 9 which extends from the platform 6 to the closure 8.

Preferably at that portion of the chamber where the pipe 2 enters the flue 3, I provide an opening 10 into which a tube 11 leads, which tube extends preferably to the open air at 12, and which tube as seen surrounds the pipe 2. Thus a fresh air inlet is provided for the chamber 9. At suitable portions of the chimney outlet registers 13 of the customary type are inserted in the walls through which the hot air from the heatingchamber 9 may pass into the room. It will thus be seen that fresh air may be taken in the pipe 11 at 12, conducted inwardly about the pipe 2 and then allowed to pass upwardly, still surrounding the flue 3 and out into the rooms through the registers 13. This fresh air is thus heated throughout the path just described and enters the rooms as heated air, being heated by the exhaust gases whose heat units would otherwise be entirely wasted.

It will of course be seen that any suitable heating system lends itself for use with my improved system. It will of course also be apparent that within the scope of the appended claim modifications may be made without departing from the spirit of my invention.

Having however thus described one form which my invention may take, what I claim as new and desire to secure by Letters Patent is:

A system of the character described comprising a combustion chamber, an exhaust tube leading from said chamber, an air chamber, a flue internally of said air chamber into which said exhaust tube leads whereby the products of combustion are prevented from entering the space around said flue, means for leading fresh air into the space about said flue, and registers in the Walls of said air chamber to conduct the heated air from saidjspace into the rooms of the house, the Walls of said air chamber having means throughout their length forming a guide for said flue, and said space in said air chamber surrounding said flue beingsubstantially closed at the top of said air chamber, the Walls of said air chamber having at their lower portion a shelf to support said flue, said means conducting fresh airto saidj'space including a tube surrounding said exhaust tube, said 7 Copies of this patent may be obtained for five cents each, by addressing the Commissioner of I'atents,

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